Why blonde cannot dial 911?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

Can you name an animal whose killing cannot be performed without spilling your own blood?

There is a square piece of paper with a hole that is denoted by the circle on the top right side in the given picture. You have to cut the paper in a manner that it forms two and only two separate pieces of paper and then rearrange the pieces in a manner that the holes come in the centre of the paper.

What has to be broken before you can use it?

You have a 12 liters jug full of water. You have two empty 8 liters and 5 liters jug. How can you divide the water into two equal parts using these jugs?

Three friends decide to distribute the soda cans they had among them. When all of them had drunk four cans each, the total number of cans that remained was equal to the cans each one of them had after they had divided the cans.

Can you calculate the total number of cans before distribution?

who is silent in the parliament?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

What does this rebus puzzle means ?